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Diffuser for a radial compressor

A diffuser and compressor technology, applied in radial flow pumps, components of pumping devices for elastic fluids, machines/engines, etc., can solve problems such as damage to compressor stage efficiency and stability, and achieve improved efficiency effect

Inactive Publication Date: 2017-02-22
ABB TURBO SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] As a result, different flow passage ratios at the exit of the compressor wheel and at the entry of the diffuser result in a distributed manner over the circumference, which can adversely affect the efficiency and stability of the compressor stages

Method used

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  • Diffuser for a radial compressor
  • Diffuser for a radial compressor
  • Diffuser for a radial compressor

Examples

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Embodiment Construction

[0017] figure 1 The radial compressor of the exhaust gas turbocharger is shown in section through the crankshaft axis. The compressor comprises a compressor wheel arranged on a crankshaft 12, the compressor wheel comprising a hub 10 and rotor blades 11 arranged on the hub. The rotor blades can be divided into main blades and intermediate blades, wherein the main blades extend over the entire length of the flow channel delimited by the hub and the adjoining housing part, while the intermediate blades are generally shortened and have a set-back inlet edge side. Here, one or more intermediate blades can be arranged for each main blade. The compressor wheel is arranged in a compressor housing, which generally comprises several parts, such as a spiral housing 31 and an inlet housing 32 . Between the compressor and the turbine, not shown, there is a bearing housing 30 which contains the bearing of the crankshaft. The aforementioned flow channel in the region of the compressor is...

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PUM

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Abstract

According to the invention, the resonant vibration of the compressor can be reduced by varying the angular distances between two adjoining guide vanes (21) of the diffuser along the circumference. Additionally, the throat area between adjoining guide vanes is kept constant, which increases efficiency and positively affects the surge margin.

Description

technical field [0001] The invention relates to the field of exhaust gas turbochargers for supercharged internal combustion engines. The invention relates to a vane-mounted diffuser of such a radial compressor of an exhaust-gas turbocharger and an exhaust-gas turbine of a radial compressor with a vane-mounted diffuser of this type in its outflow region Supercharger. Background technique [0002] In modern exhaust gas turbochargers, in order to increase the intake pressure of the engine, a single-stage radial compressor with a bladed diffuser downstream of the compressor wheel is usually used. In a diffuser, the kinetic energy of the medium to be compressed is converted into static pressure. The compressor wheel comprises a defined number of working blades, and the diffuser has vanes with a prismatic, usually aerodynamic profile (wedge, or airfoil). Viewed in the direction of the compressor axis, the guide vanes have a defined tangential angle at the entry edge (entry angl...

Claims

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Application Information

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IPC IPC(8): F04D29/44F04D29/66
CPCF04D29/444F04D29/666F05D2250/52F05D2260/961F02B33/40F02B37/00Y02T10/12F04D17/10F04D25/04F04D29/056F04D29/284
Inventor D.鲁施
Owner ABB TURBO SYST